Galaxy Note 4 keyboard issue after updating to Lollipop, other issues

Although Android Marshmallow has already started to become available to newer devices, a huge number of Samsung Galaxy devices, including the #GalaxyNote4, is still running Lollipop at this time. This post addresses some of the post-Lollipop problems encountered by some Note 4 users as well as other problems not totally related to Android update. Below